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TypeErrors when iterating over results from GetDialogs

See original GitHub issue

Hello - I have some different type errors that are a bit confusing. I am calling client.getDialogs({})

AppDir/src/lib/telegram.ts (133,26): Property 'id' does not exist on type 'never'.
AppDir/src/lib/telegram.ts (134,26): Property 'title' does not exist on type 'never'.
AppDir/src/lib/telegram.ts (135,26): Property 'accessHash' does not exist on type 'never'.

src/lib/telegram.ts:131:19 - error TS2339: Property 'className' does not exist on type 'Dialog'.

131         && dialog.className === 'Channel'
                      ~~~~~~~~~

src/lib/telegram.ts:133:26 - error TS2339: Property 'title' does not exist on type 'Entity'.
  Property 'title' does not exist on type 'User'.

133         && dialog.entity.title != null
                             ~~~~~

src/lib/telegram.ts:134:26 - error TS2339: Property 'accessHash' does not exist on type 'Entity'.
  Property 'accessHash' does not exist on type 'Chat'.

134         && dialog.entity.accessHash != null) {

The code I’m calling is:

const dialogs = await client.getDialogs({});
const entities = dialogs.reduce((result, dialog) => {
  if (dialog.entity != null
      && dialog.className === 'Channel'
      && dialog.entity.id != null
      && dialog.entity.title != null
      && dialog.entity.accessHash != null) {
    const { id, title, accessHash } = dialog.entity
    result.push({ id, title, accessHash });
  }
  return result;
}, []);

My code works and I get the expected variables set (id, title, accessHash). What can I do to satisfy the errors above?.

Issue Analytics

State:
Created 2 years ago
Comments:8 (8 by maintainers)

Top GitHub Comments

2reactions

painorcommented, Sep 10, 2021

you could use instanceof and that will fix it all.

   if (dialog.entity instanceof Api.Channel) {
        const { id, title, accessHash } = dialog.entity

Typescript isn’t that smart to know what type you want by eliminating attributes.

0reactions

KidA001commented, Sep 15, 2021

Closing for now

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